Xbolts



ZbrzZZ concern.' H s Beit known `that l, fRolERr CRICHTON, of

tain new and useful `ImprCnfements in Ma- ""chines` for Making Bolts; `and -I do hereby f declare that the following is a full, clear, and exact description of the construction and .j operation of the same, reference being had tothe accompanying drawings, making a part ;`of this specification, inwhic Figure l, isa "or top view of the machine.` Fig.2,` is a face view of the circular frame` in which the lateral` heading dies or n *toolswork 1Fig.3,is a detached view of the y holding jaws.` Fig.A 4:,is a section,showing the mannerin whichxthe head ofthe bolt is formed.` j Fig;` 5, is a view, showing the op- `,eration of the` iateralheading` dies,'and also @the operation of `thefjawswhich `form the u body of the bolt@ 1 f f j Similar letters of referenceindicate corresponding m .uresu To enable those skilled in the art tomake "and `usevmy inventioml will proceed to de-` scribe its construction and operation. A, `isa circular frame, in which are placed fourfsmaller framesor sashes, B, B, B, B I; saidsashes working in "orbetween grooves in thecircular frame, A, andina direction at right angles` to eachother. To" the inner lends of thesashes, .B,\are aflixed the heading i tools or dies,.C; a heading toolzto each sash see Fig. 2. Within eachsash, there is a cam, j D; `these cams are placed on shafts, E; and on the endsl of the` shafts, E, `oppositeto where the `cams are "attached, are toothed wheels, F, which gear into each other; see'`r Fi 1. l. (gin the` outer surface ofthe circular frame, A, theforming `and holding jaws are placed; see Fig.` 1. The'kho-lding jaws are denoted by, (a), (01') and the forming jawsby, (b),

\ The jaws, (a),(b),` are stationary;` but the jaws, (w)`,]and, (b),"are movable, f and are operated by `cams, (c), (c), which" f1 work within sashes, G, G; the jaws, (a) I being attachedto the sashes, G, G, by rods, (d), (d). It will be seen that one holding hand one formingfjaw is stationary, `and `two jaws aremovable, andiwork simultane `ouslyside by side."` `,The jaws are held in a suitable frame, H, attachedto the face of the circular frame, At

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,i Buchanamin the county ofAllegheny'and j State of Pennsylvania, have invented cer-` parts, -in each ofthe severalffi'g` j j placed sideby side; and that the remaining rien. y.

. iivneiclirlvn `non ivrnmivc. Bows.

` `spaicatipnorLetterslatentivo, 12,815, `elated ivray 8,1855.

theja'ws to act upon and form the bolt.

Directly `back "of `the circular frame, A,

and at its center, there ista'horizontal heading die or tool,`J, shown in Fig. 1l. This die,

J, is attached to the end of a shaft, K, which works in proper bearings, (e), (e). Behind the shaft, K, there is another horizontal shaft, L, working in suitable bearings; one

of which bearings, (f), is shown in Fig. 4. The shaft, L, is attached to ay sash, M, which has within it a cam, N; the said cam, N, and a portion of. the sash, M, are shown in Fig.` 4; and themtop of the sash is shown in red in Fig. l. `The cam, N, is operated by means of the bevel wheels, O, P, seen in Fig. l; the wheel P, being upon one of the shafts, E, before described. i

Operation: The bar, R, is placed in the rest, I, and the end of it is shoved forward until it touches the horizontal heading die,

J. "The toothed wheels, F, are then turned;

`powerbeing ,appliedto either one of them;

and the two jaws, (21),*(5), are moved forward against the stationary jaws, (d) The jaws, (a), (a), hold `the bar firmly, and `prevent it from moving; they perform fr, isa restan which the mais placed for` no other office.V The jaws, (b), give' .the end of the bar the proper form for the body'of the bolt. When the jaws, (a),

"and (a), (bf), come together, the horizontal headingdie, J, is moved or forced toward the circular frame, A, by means of the cam, N, which, as it revolves, forces the shaft, L, forward, and against the end of the be obtained by referring to Figs. L and 5.

The horizontal heading die, J, and the lateral heading dies, C, and the jaws, then move back to their original position; the bolt is taken out;land the machine is again ready for another feed.

4The die, J, is drawn back by means of a it when the shaft, L, is'drawn back, 'by the cam, Nfl The die, J, is prevented from loeing drawn too far back, by a stop, (it attached to oneof the bearings, (e), as s own spiral spring, (g)'; the spring acting upon I prefer to have the holding jaws, (a), (af), formed with, V, recesses, in their face sides, as shown in F ig. 3. By this means, thesame jaws will hold different Sized bars.

The foregoing described machine is perfectly simple, not liable to get out of repair, and works well, practically. The holding jaws prevent the bolts from being bruised as they grasp the cold portion of the bar; the end of the bar, where the bolt is to be formed, being heated previous to its insertio-n in the machine.

I do not claim the adjustable shaft L, the

detached shaft K, the spring g, or the stop 71, these having been known and used separately before; but

I do claim- The combination of the adjustable shaft L, the detached shaft K, the spring g and stop h, with the sash M and horizontal heading tool J to regulate the quantity of iron in and thickness of head as herein shown and described.

ROBERT CRICHTON. Witnesses:

HENRY MCCINLER, R. HOLMES. 

